Harold was the second son of William and Charlotte Huntriss, and became a professional soldier, going to Sandhurst in 1908, eventually joining the Bedfordshire Regiment. He was promoted to Lieutenant on 3rd May 1911 and arrived with the 2nd Battalion of the in France 6th October 1914. Lieutenant Huntriss was hit by shrapnel in the left thigh on the 29th or 30th October, during intense fighting east of Ypres and returned to England to recover after an operation.
Harold returned to the 2nd Battalion in April or May 1915 but was killed on 17th May at the head of his Company in the battle of Festubert, as they advanced to the second German trench line. He is buried in the Guards Cemetery, Windy Corner,Cuinchy.